Range Rover · L405 · 2013–2022
Range Rover (L405) radiator caps
Expansion tank pressure caps for Land Rover cooling systems.
Matching radiator caps to a Range Rover (L405)
The Range Rover (L405) (2013–2022) was sold here with 2 different engines. Gearbox: 8-speed automatic. Send the VIN and engine number with your enquiry so the parts team can confirm the correct radiator caps before quoting.
Know the part
Understanding Range Rover (L405) Radiator Caps
On most Land Rovers the pressure cap sits on the expansion tank rather than the radiator. It holds the cooling system at a set pressure, which raises the coolant's boiling point, and releases excess pressure through a valve.
Cap seals harden and springs weaken over time. A cap that no longer holds pressure lets coolant boil and escape, and one that sticks can over-pressurise hoses and the tank.
Further reading
- Radiator (engine cooling) – Wikipedia
Background on cooling system pressure.
Common Questions About Range Rover (L405) radiator caps
How can I tell if my expansion tank cap is faulty?
A workshop can pressure-test the cap to check it opens at the right pressure. Look for a hard, flattened or cracked seal as a visual clue.
Can I fit any cap that fits the thread?
No. The pressure rating must match your system. The wrong cap can cause overheating or damage.
Is it safe to open the cap when the engine is hot?
No. Wait until the engine has cooled. Hot, pressurised coolant can spray out and cause serious burns.
What should I send to order a cap?
The VIN or a photo of the existing cap showing any markings.
Other Range Rover (L405) cooling
Not sure which part fits?
Share your VIN or engine code and the parts team will check the correct part for your Range Rover (L405).